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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 210 |
| 2 | 91728 |
| 3 | 48348300 |
| 4 | 27795877200 |
| 5 | 16801416515520 |
| 6 | 10492649333712000 |
| 7 | 6704867164952174400 |
| 8 | 4357981459741604877000 |
| 9 | 2869985317222538272758000 |
| 10 | 1909866367099566641482516800 |
| 11 | 1281775836140482143996826609500 |
| 12 | 866321769175062822028788514251300 |
| 13 | 589012467640059218480339437176228000 |
[1,210,91728,48348300,27795877200,16801416515520, 10492649333712000,6704867164952174400, 4357981459741604877000,2869985317222538272758000, 1909866367099566641482516800, 1281775836140482143996826609500, 866321769175062822028788514251300, 589012467640059218480339437176228000] |